Venom is only used locally to make antivenom. There is only one antivenom producer and they have long standing contracts with two institutes locally. There is enough dried venom for quite a few years so the demand will be virtually zero.

I have had many requests from people "who own venomous snakes" to milk the snake because they think then the snakes are less venoumous. Have never done it and will not I's rather leave that to the guys who really know mor than me

I think the transition from boa's to full blown hot's is a steep one. These snakes aren't like boa's mate. If the market isn't right for freeze dried venom, which it isn't. Why would u want to do it? You run the daily risk of being killed, over time u can develop a hypersensitivity to venom, in which case the risk of death from a venomous snake bite is huge.